dpasek wrote:some hand tools like Xcelite and Craftsman screwdrivers and nut drivers are made of a type of plastic known as cellulose acetate butyrate.

Indeed. Apart from its possible smell, that resin is very strong, durable, and transparent; ideal for tool handles.Some manufacturers that still make CAB handles, like PB Swiss, add vanilla fragrance to cover any butyric acid smell.Most users just get on with using their tools instead of sniffing them, I think...